I don't know. This motor has me scratching my head. It makes more hp & tq than a stock HD, but the M8 closes that gap. Where HD shines, let her breathe, add a cam, & she really comes to life. This motor doesn't react the same. Tq goes up, but hp doesn't jump like a HD. Not sure, but it might be the intake runners, they're massive & short.

There's a kit out with headwork, cams, 117" etc, that runs about 110hp & 130tq. I can install a set of cams That do that by themselves! The only thing I've seen that increases hp numbers is boost. That tells me the heads flow, as long as they have the air. They just don't have the velocity by themselves.

I see absolutely NO reason to go big bore on this bike. I might do cams, but I'm thoroughly pleased with intake, slipons, & a good tune. It don't take long to get up to cruising speed, that's for sure!




Mike